I do not know about PVC, but cellular core ABS is not allowed in some areas.

: HELP! I'm starting my plumbing job this weekend and just picked up my PVC. I went to Menards instead of Home Depot because their 3" PVC was advertised as less expensive. However I realized it is lighter and noticed it is labeled as "Bristolite Schd 40 PVC - COEX Cellular core". A quick visit to the Bristol Pipe website (http://www.bristolpipe.com/Product_Details/PVC_foamcore_dwv.html) made me realize that it isn't what I've used in the past: . : I'm wondering if most inspectors consider it suitable for DWV work or if I should return it and get the standard pressure rated stuff at Home Depot. My town's inspector is off until Tuesday & I can't hold off until then.

: Any thoughts or experiences? Is this pipe any noisier then standard shedule 40 PVC?